The managed Kubernetes decision

Choosing between Amazon EKS (Elastic Kubernetes Service) and Azure AKS (Azure Kubernetes Service) is one of the most consequential infrastructure decisions a growing engineering team makes. Both are production-grade, both abstract away control plane management — but they differ significantly in pricing, operational model, developer experience, and ecosystem integrations.

This guide gives you the context to make an informed decision based on your cloud strategy, team skillset, and workload requirements.

Quick comparison

Feature	Amazon EKS	Azure AKS
Control plane pricing	$0.10/hour (~₹8.5/hour)	Free
Kubernetes upgrades	Semi-managed	Automated or manual
Networking	VPC CNI, Calico	Azure CNI, Kubenet
Storage integration	EBS, EFS, S3	Azure Disk, Azure Files
IAM integration	IAM Roles for Service Accounts (IRSA)	Azure AD Workload Identity
GPU support	Yes (EC2 GPU instances)	Yes (Azure GPU VMs)
Managed node groups	Yes	Yes (System + User node pools)
Spot/Preemptible	EC2 Spot Instances	Azure Spot VMs
Multi-region clusters	Manual (no built-in)	Manual (no built-in)
Autoscaler	Cluster Autoscaler, Karpenter	Cluster Autoscaler, KEDA

Amazon EKS: strengths and trade-offs

Strengths

Mature ecosystem. EKS has the most mature third-party tooling ecosystem. Most Kubernetes operators, CSI drivers, and cloud-native tools are tested on EKS first.

AWS service integrations. Native integration with IAM, CloudWatch, ALB Ingress Controller, RDS, ElastiCache, and the full AWS service catalog is a major advantage for teams already on AWS.

Karpenter. AWS-developed Karpenter is the fastest, most efficient node autoscaler available. It provisions nodes in ~30 seconds and consolidates underutilized nodes automatically. For variable workloads, this alone justifies EKS.

IRSA (IAM Roles for Service Accounts). Fine-grained IAM permissions per pod without storing credentials in Kubernetes secrets.

Trade-offs

Control plane cost. EKS charges $0.10/hour per cluster (~₹7,000/month). For teams running 5+ clusters, this adds meaningful cost.

Networking complexity. The VPC CNI assigns real VPC IPs to pods, which can exhaust IP space in large clusters without careful planning. /24 subnets fill up quickly.

Operational surface. More configuration is required compared to AKS. You manage node groups, launch templates, and AMI patching.

Azure AKS: strengths and trade-offs

Strengths

Free control plane. AKS doesn’t charge for the Kubernetes control plane. For teams running many clusters (dev, staging, prod, per-team), this is a significant cost advantage.

Azure AD integration. AKS integrates deeply with Microsoft Entra ID (Azure AD) for RBAC. For enterprises already on Microsoft 365 and Azure, this simplifies identity management considerably.

Node pool flexibility. AKS separates System node pools (for Kubernetes system pods) and User node pools (for workloads). Mixing Windows and Linux nodes in the same cluster is straightforward.

Dev/test cost optimization. Stop AKS clusters when not in use — you pay only for VMs. For non-production environments, this can reduce costs significantly.

Azure Monitor integration. Built-in integration with Container Insights, Log Analytics, and Azure Monitor provides out-of-box observability without additional tooling.

Trade-offs

Slower upgrade cadence. AKS sometimes trails EKS on latest Kubernetes version availability.

Limited Karpenter equivalent. KEDA provides event-driven autoscaling but doesn’t match Karpenter’s node consolidation efficiency.

Regional availability. Some Azure regions have limited AKS features or GPU VM availability compared to AWS.

When to choose EKS

Choose Amazon EKS if:

Your team is already on AWS with significant AWS service dependencies (RDS, SQS, DynamoDB, S3)
You need Karpenter for aggressive autoscaling and cost optimization
You’re running ML/AI workloads and need tight EC2 instance family flexibility
Your DevOps team has existing AWS expertise
You need the broadest Kubernetes tooling ecosystem support

When to choose AKS

Choose Azure AKS if:

Your organization is Microsoft-first (Office 365, Azure AD, Azure DevOps)
You’re running many clusters and want to avoid EKS control plane fees
You need Windows containers alongside Linux workloads
Your team uses Azure DevOps and wants native CI/CD integration
You’re in a regulated industry with existing Microsoft enterprise agreements

Migration considerations

Migrating from EKS to AKS (or vice versa)

A managed Kubernetes migration typically involves:

Assessment (1-2 weeks) — Inventory workloads, identify cloud-specific dependencies, map IAM roles
Architecture design (1 week) — Design target cluster topology, networking, and identity configuration
Tooling migration (2-4 weeks) — Update Helm charts, Terraform modules, and CI/CD pipelines
Workload migration (2-6 weeks depending on complexity) — Blue/green cutover per service
Stabilization (2-4 weeks) — Performance validation, cost baseline, monitoring tuning

Cloud-specific dependencies (RDS, Azure SQL, S3, Azure Blob) require the most migration effort. Stateless workloads with external databases migrate fastest.

Multi-cloud considerations

Some organizations run EKS on AWS and AKS on Azure simultaneously:

Compliance requirements — Certain data must stay in specific regions or clouds
Disaster recovery — Multi-cloud active-passive failover
Acquisition integration — Two companies on different clouds merging workloads

Multi-cloud Kubernetes adds operational complexity: separate control planes, different CNI models, divergent IAM patterns. Unless you have specific requirements, single-cloud simplicity usually wins.

Our recommendation

For most Indian startups and enterprises:

AWS EKS if you’re greenfield on AWS or heavily AWS-dependent
Azure AKS if you’re a Microsoft-aligned enterprise or running 5+ clusters

The tooling and expertise gap between the two has narrowed significantly in 2024-2025. The better choice is usually determined by your existing cloud relationships, not Kubernetes features.

If you’re evaluating or planning a migration between managed Kubernetes platforms, talk to our team. We’ve run dozens of EKS and AKS migrations for Fintech, SaaS, and AI companies and can help you scope the work accurately.